Updated to 3.7 - backend error 0 Call to undefined method.. - Joomla! Forum - community, help and support

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upgraded 3.7.0 morning, got blank page others discussing. couldn't fix decided go version prior. however, did not uninstall 3.7 , have created mess. error message in backend is: "an error has occurred.0 call undefined method japplicationadministrator::isclient() return control panel"

however, cannot access control panel.

any suggestions? our website http://www.northshelbylibrary.org

thank you.

fixed issue.





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